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Asked by Anonymous

31% of adults say that cashews are their favorite kind of nut. You randomly select 12 adults and ask them to name their favorite nut. Find the probability that the number who say cashew istheir favorite nut is a(exactly three) b. at least four and c at most 2
11 years ago

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Answered by Kuai
a. 12C3(.31)^3(.69)^9 = .23235

b. 1-[(12C0)(.31)^0(.69)^12 + 12C2(.31)^2(.69)^10 + 12C3(.31)^3(.69)^9 ] = 0.5381

c. 12C0(.31)^0 (.69)^12+ 12C1(.31)^1(.69)^11 + 12C2(.31)^2(.69)^10 = 0.2295875
11 years ago

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